911.01 971 SECTION 9 11 – LUMBER, TIMBERS, AND TIMBER PILES
911.01 Lumber and Timbers ................................ ................................ .... 971
911.02 Treated Lumber and Timbers ................................ ....................... 972
911.03 Timber Piles ................................ ................................ ................. 972
911.01 Lumber and Timbers
A.General Refer to AASHTO M 168 for grading and terminology. This Section primarily addresses bridge and miscellaneous roadway materials.
B.Species of Wood Use Southern Yellow Pine in accordance with Southern Pine Inspection Bureau (SPIB) Specifications or as otherwise shown on the Plans.
C.Grades of Lumber and Timber Provide lumber and timbers for permanent use in structures that is grade marked or hammer stamped by a recognized acceptance agency that conforms to the following :
1.Yard Lumber . Provide yard l umber with a grade of C Finish, when a choice quality grade for finish purposes and appearance is a requirement , especially when painted.
a.No. 1. Provide #1 Grade lumber and timbers for general construction and utility purposes where strength is a consideration.
b.No. 2. Provide #2 Grade lumber and timbers for general construction and utility purposes where strength is not a consideration .
2.Structural or Stress Rated Lumber and Timber. As specified or otherwise noted in the plans, provide lumber and timbers of a 911.02 972 structural grade conforming to the grading rules of the Southern Pine Inspection Bureau (SPIB). Allowable stress shall be in accordance with the current SPIB grading rules .
911.02 Treated Lumber and Timbers
Treated lumber and timbers shall conform to the requirements of 911.01 and are to be treated by a pressure method to retain the minimum retention of preservative per cubic foot of wood for the designated use as outlined in American Wood Protection Association (AWPA) Standard U1, Co mmodity Specification A: Sawn Products . All preservatives must be registered with the USEPA under FIFRA. The Engineer will not accept treated s tructural lumber or timbers for use unless it has been inspected and found satisfactory both before and after treatment. Material that is grade marked and or tagged bearing the mark of an agency accredited under the American Lumber Standards Committee, Inc. (ALSC) shall be acceptable. Alternatively, the manufacturer may furnish a notarized Certificate of Complianc e which includes the tally, grade, and preservative retention of material provided.
911.03 Timber Piles
A.General Provide untreated or treated timber piles in accordance with ASTM D25 Standard Specification for Round Timber Pile. Fabricate r ound piles to meet the minimum diameter s specified in Table
911.03 1.
Table 911.03 -1: Timber Pile Diameters Length of Pile Tip Diameter (inches) Butt End Diameter (inches) 20 feet and under 8 11 Over 20 feet up to 40 feet 8 12 Over 40 feet up to 60 feet 7 12 Over 60 feet 6 13 The diameter of the piles at the butt shall not exceed 18 in ches. 911.03 973 Provide piles that have a uniform taper from butt to tip, are straight grained.
B.Preservative Treatment Pressure preservative treat timber piles with a preservative specified in AASHTO M133 and in accordance with AWPA U1, Commodity Specification E: Round Timber Piling, UC4C. All preservatives must be registered with the USEPA under FIFRA. 912.01 974 SECTION 912 – BRICK
912.01 Building Brick ................................ ................................ .............. 974
912.02 Sewer Brick ................................ ................................ .................. 974
912.03 Masonry Mortar ................................ ................................ ........... 974
912.04 Concrete Masonry Units ................................ .............................. 975
912.05 Brick Paving Units ................................ ................................ ...... 975
912.01 Building Brick
Provide brick of the kind and grade specified.
A.Clay or Shale Brick Provide brick conforming to ASTM C62.
B.Concrete Brick Provide brick conforming to ASTM C55.
912.02 Sewer Brick
Provide brick conforming to ASTM C32.
912.03 Masonry Mortar
Compose mortar of one part Portland cement and two parts sand. The Contractor may add hydrated lime to the Portland cement in an amount not to exceed 10%. Add wate r to the mixture in quantities that will allow a stiff paste to form. Either hand -mix or machine -mix the mortar. To prepare hand -mixed mortar, thoroughly mix the sand, cement, and hydrated lime together in a clean, tight, mortar box. Once the mixture is of uniform color, add water. Prepare machine-mixed mortar in an approved mixer and mix not less than 1-1/2 minutes. Use mortar within 30 minutes after mixing. Do not retemper mortar.
Source: Tennessee Standard Specifications for Road and Bridge Construction, 2021 Edition. Pages 980–982 of 1,072.